The use of virtual models designed to accurately reflect a physical object has over the last decade enabled an unprecedented precision in the simulation of the acoustical properties of devices before they materialize. This paper introduces a new and standardized fullband ear simulator and explains some of the important characteristics, such as the acoustic impedance and the geometry of the ear simulator. A corresponding virtual model – or digital twin – and the basis for the digital twin is explained.For the physical fullband ear simulator and its digital twin the acoustical impedance is analyzed to determine the correlation between the two.